src/univ/theme.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        univ/theme.cpp
   3 // Purpose:     implementation of wxTheme
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     06.08.00
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2000 SciTech Software, Inc. (www.scitechsoft.com)
   9 // Licence:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ===========================================================================
  13 // declarations
  14 // ===========================================================================
  15
  16 // ---------------------------------------------------------------------------
  17 // headers
  18 // ---------------------------------------------------------------------------
  19
  20 #ifdef __GNUG__
  21     #pragma implementation "theme.h"
  22 #endif
  23
  24 // For compilers that support precompilation, includes "wx.h".
  25 #include "wx/wxprec.h"
  26
  27 #ifdef __BORLANDC__
  28     #pragma hdrstop
  29 #endif
  30
  31 #ifndef WX_PRECOMP
  32     #include "wx/intl.h"
  33     #include "wx/log.h"
  34 #endif // WX_PRECOMP
  35
  36 #include "wx/artprov.h"
  37
  38 #include "wx/univ/renderer.h"
  39 #include "wx/univ/inphand.h"
  40 #include "wx/univ/theme.h"
  41
  42 // ============================================================================
  43 // implementation
  44 // ============================================================================
  45
  46 wxThemeInfo *wxTheme::ms_allThemes = (wxThemeInfo *)NULL;
  47 wxTheme *wxTheme::ms_theme = (wxTheme *)NULL;
  48
  49 // ----------------------------------------------------------------------------
  50 // "dynamic" theme creation
  51 // ----------------------------------------------------------------------------
  52
  53 wxThemeInfo::wxThemeInfo(Constructor c,
  54                          const wxChar *n,
  55                          const wxChar *d)
  56            : name(n), desc(d), ctor(c)
  57 {
  58     // insert us (in the head of) the linked list
  59     next = wxTheme::ms_allThemes;
  60     wxTheme::ms_allThemes = this;
  61 }
  62
  63 /* static */ wxTheme *wxTheme::Create(const wxString& name)
  64 {
  65     // find the theme in the list by name
  66     wxThemeInfo *info = ms_allThemes;
  67     while ( info )
  68     {
  69         if ( name.CmpNoCase(info->name) == 0 )
  70         {
  71             return info->ctor();
  72         }
  73
  74         info = info->next;
  75     }
  76
  77     return (wxTheme *)NULL;
  78 }
  79
  80 // ----------------------------------------------------------------------------
  81 // the default theme (called by wxApp::OnInitGui)
  82 // ----------------------------------------------------------------------------
  83
  84 /* static */ bool wxTheme::CreateDefault()
  85 {
  86     if ( ms_theme )
  87     {
  88         // we already have a theme
  89         return TRUE;
  90     }
  91
  92     wxString nameDefTheme;
  93
  94     // use the environment variable first
  95     const wxChar *p = wxGetenv(_T("WXTHEME"));
  96     if ( p )
  97     {
  98         nameDefTheme = p;
  99     }
 100     else // use native theme by default
 101     {
 102         #if defined(__WXGTK__)
 103             nameDefTheme = _T("gtk");
 104         #elif defined(__WXX11__)
 105             nameDefTheme = _T("win32");
 106         #else
 107             nameDefTheme = _T("win32");
 108         #endif
 109     }
 110
 111     wxTheme *theme = Create(nameDefTheme);
 112
 113     // fallback to the first one in the list
 114     if ( !theme && ms_allThemes )
 115     {
 116         theme = ms_allThemes->ctor();
 117     }
 118
 119     // abort if still nothing
 120     if ( !theme )
 121     {
 122         wxLogError(_("Failed to initialize GUI: no built-in themes found."));
 123
 124         return FALSE;
 125     }
 126
 127     // Set the theme as current.
 128     wxTheme::Set(theme);
 129
 130     return TRUE;
 131 }
 132
 133 /* static */ wxTheme *wxTheme::Set(wxTheme *theme)
 134 {
 135     wxTheme *themeOld = ms_theme;
 136     ms_theme = theme;
 137
 138     if ( ms_theme )
 139     {
 140         // automatically start using the art provider of the new theme if it
 141         // has one
 142         wxArtProvider *art = ms_theme->GetArtProvider();
 143         if ( art )
 144             wxArtProvider::PushProvider(art);
 145     }
 146
 147     return themeOld;
 148 }
 149
 150 // ----------------------------------------------------------------------------
 151 // assorted trivial dtors
 152 // ----------------------------------------------------------------------------
 153
 154 wxTheme::~wxTheme()
 155 {
 156 }
 157